Home / 20,359.11-28,100.61-13,663.65

Finding the Fourth Proportional to 20,359.11, 28,100.61 and 13,663.65

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Solution

The fourth proportional to 20,359.11, 28,100.61 and 13,663.65 is: 18,859.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,359.11 : 28,100.61 = 13,663.65 : x
  2. Step 2: Convert to fraction form
    20,359.11/28,100.61 = 13,663.65/x
  3. Step 3: Cross multiply
    20,359.11x = 28,100.61 × 13,663.65
  4. Step 4: Simplify right side
    20,359.11x = 383,956,899.83
  5. Step 5: Solve for x
    x = 383,956,899.83/20,359.11
  6. Step 6: Final answer
    x = 18,859.22

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.